Show slider based on supported_features, but that's a deprecated feature in HA

My Home Assistant version: core-2021.5.1

My lovelace configuration method (GUI or yaml):

- entity: light.brynxz_lamp
  secondary_info: brightness
  type: 'custom:slider-entity-row'
  toggle: true

What I am doing: Set light off

What I expected to happen: Show slider with dimlevel 0

What happened instead: Slider is hidden

Minimal steps to reproduce:

State from developer tools:
supported_color_modes:
  - brightness
friendly_name: Brynxz lamp
icon: 'hass:floor-lamp'
supported_features: 0

Error messages from the browser console:

---

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[thomasloven]

Try 17.1.0

[pascalwinters]

It works. Great work!